**Current ensemble forecasts from the Met Office, GFS, and other models indicate an overnight low in London on August 24 likely between 13–16 °C, with the tightest clustering around 13–15 °C.** This range aligns with the market’s leading implied probabilities (14 °C at 39 %, 13 °C at 25.5 %, 15 °C at 24 %), reflecting trader consensus on radiative cooling under high pressure (1020–1025 hPa) and light northeast-to-east winds that limit mixing. Partly cloudy skies and dew points near 10–11 °C support efficient surface cooling after sunset, while the absence of significant cloud cover or precipitation overnight favors the lower end of the range. August 2026 has run warmer than the long-term August mean, but recent model runs show the warm anomaly easing, consistent with typical late-summer diurnal ranges of 8–10 °C under settled conditions. Key upcoming updates include the next Met Office and ECMWF runs, which could refine the exact minimum if wind or cloud forecasts shift. Resolution will be based on the official recorded minimum at a designated London station, making these near-term model trends the dominant driver of current odds.